His family launched a desperate search to find Julian via social media. Julian's grandfather, Tony, posted on Facebook after the attack: "My Grandson, Julian Alessandro Cadman is missing. Please like and share. We have found Jom (my daughter in law) and she is (in a) serious but stable condition in hospital.

"Julian is seven years old and was out with Jom when they were separated, due to the recent terrorist activity. Please share if you have family or friends in Barcelona."

Spanish authorities confirmed they had identified three more fatalities on Sunday afternoon from the attack in Catalonia.

Foreign minister Boris Johnson tweeted his sympathies to the Cadman family following the confirmation of Julian's death.